1. What is the view of the tissue section under a light microscope? * A. whole mount B. 2-D image C. 3-D image D. stereoscopic 2. Why do you need to wrap the petri plates with used bond papers? * A. to prevent condensation. B. to prevent breakage C. to prevent contamination D. all of these are correct

3. Bome pieces of bread were placed in different.condiions as shown in the table below. Bread Presence of Temperaturs (C) Amount of water light (ml) Yes 20 No No Yes Yes D. No 30 Yes Yes 30 Yes (a) Which piece(s) of bread islare likely to have mould growing on it after one week? Explain your answer. (b) If Tom wanted to find out if the presence of light affected the growth of bread mould, which pieces of bread should he compare? Explain your answer.

1. Describe the properties of the element tungsten. 2. List two reasons why it is a good material for x-ray tube targets and at least one reason why it is used for x-ray tube filaments. 3. Name the three components of the x-ray tube that contribute to the inherent filtration. 4. If a patient has a body part that has a very thick portion and a very thin portion, which aspect of the x-ray tube should be placed over the thinnest area

you are looking at a slide in the laboratory and observe a cell that occupies one quarter of the field of view at high magnification. use your field diameter calculation from lab activity 4 to estimate the size of this cell.